Aluminium tubular double barrel pointerless spring balance with anodized inner and outer barrel. The length of inner barrel coming out gives the reading on the scale in gms and newtons both provided with zero adjustment device working on a screw system with suspension ring and load hook packed in card board box :

(a) 1N/100g
(b) 2.5N/250g
(c) 5N/500g 
(d) 10N/1Kg
(e) 20N/2Kg
(f) 30N/3Kg